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A sintering process of a large-grain ultra-special powder used as a sintering primer

A technology of super-special powder and base material, applied in the field of sintered pellets, can solve the problems of increasing production cost, decreasing output of sintered products, increasing energy consumption, etc., and achieving the effect of increasing the yield of sintered products and decreasing solid fuel consumption.

Active Publication Date: 2021-04-06
武汉钢铁有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the sintering base material is sieved from the sintered finished ore, it will lead to a decrease in the output of the sintered finished ore, resulting in increased energy consumption and increased production costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The large-grain ultra-special powder provided in this embodiment is used as a sintering process for the sintering primer, and the sintering process includes:

[0041] Determine that the basicity central value is 1.90 times, and before the sintering machine is laid into the mixture, the super special powder base material is spread in the sintering machine, and the super special powder particle size is 10--20mm.

[0042] Specifically, by weight percentage, the composition of the mixture is as follows: mixing powder 59%, returned ore 25%, coal powder 3.7%, limestone 4.35%, dolomite 4.4%, granular ash 3.55%.

[0043] Specifically, by weight percentage, the composition of the mixed powder is as follows: 23% card powder, 10% ah powder, 46% Yangdi powder, 4% SiC concentrate, 5% super special powder, 4% lake powder, Iron dust mud 2%, new powder 4%, plum essence 2%.

[0044] Specifically, the particle size of the pulverized coal is 0.5-3mm.

[0045] Specifically, the particle ...

Embodiment 2

[0050] The large-grain ultra-special powder provided in this embodiment is used as a sintering process for the sintering primer, and the sintering process includes:

[0051]Determine that the central value of the basicity is 1.90 times, and before the sintering machine is filled with the mixture, the super special powder base material is spread in the sintering machine, and the particle size of the super special powder is 10-20mm.

[0052] Specifically, by weight percentage, the composition of the mixture is as follows: mixing powder 59%, returned ore 25%, coal powder 3.7%, limestone 4.35%, dolomite 4.4%, granular ash 3.55%.

[0053] Specifically, by weight percentage, the composition of the mixed powder is as follows: 23% card powder, 10% ah powder, 46% Yangdi powder, 4% SiC concentrate, 5% super special powder, 4% lake powder, Iron dust mud 2%, new powder 4%, plum essence 2%.

[0054] Specifically, the particle size of the pulverized coal is 0.5-3mm.

[0055] Specifically,...

Embodiment 3

[0060] The large-grain ultra-special powder provided in this embodiment is used as a sintering process for the sintering primer, and the sintering process includes:

[0061] Determine that the central value of the basicity is 1.90 times, and before the sintering machine is filled with the mixture, the super special powder base material is spread in the sintering machine, and the particle size of the super special powder is 10-20mm.

[0062] Specifically, by weight percentage, the composition of the mixture is as follows: mixing powder 59%, returned ore 25%, coal powder 3.7%, limestone 4.35%, dolomite 4.4%, granular ash 3.55%.

[0063] Specifically, by weight percentage, the composition of the mixed powder is as follows: 23% card powder, 10% ah powder, 46% Yangdi powder, 4% SiC concentrate, 5% super special powder, 4% lake powder, Iron dust mud 2%, new powder 4%, plum essence 2%.

[0064] Specifically, the particle size of the pulverized coal is 0.5-3mm.

[0065] Specifically...

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PUM

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Abstract

The invention relates to a sintering process for using large-grain ultra-special powder as a sintering base material, which belongs to the field of sintering pellets. Before, in the sintering machine, the ultra-special powder base material is spread, and the ultra-special powder particle size is ≥ 10mm. The large particle ultra-special powder provided by the embodiment of the present invention is used as the sintering process of the sintering base material, and the sintering yield is increased by 3- About 4%, the utilization factor is increased by 0.15t / m 2 ·h, the drum index increases by about 1%, and the solid fuel consumption decreases by 4kg / t.

Description

technical field [0001] The invention belongs to the field of sintered pellets, and in particular relates to a sintering process in which large-grain ultra-special powder is used as a sintering primer. Background technique [0002] In sintering production, a layer of fuel-free charge is laid between the sintering mixture and the grate bar, that is, the base material. The sintering base material is the sintered ore with a smaller particle size of 8-15mm or 10-20mm obtained by screening the sintered finished ore several times. It is a sintered ore between the returned ore and the finished ore. Since the sintering base material is obtained by sieving the finished sintered ore, the output of the finished sintered ore will decrease, resulting in increased energy consumption and increased production costs. Therefore, there is an urgent need in the art for a primer that can replace the sintered primer. Contents of the invention [0003] In view of the above problems, the present...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B1/20
CPCC22B1/20
Inventor 李井成孙庆星蒋国波范维国罗之礼
Owner 武汉钢铁有限公司
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